>>23320858Just because there's 2 answers doesn't automatically mean 50/50.
Chances are not always evenly distributed. It doesn't have to be 50/50, it could be 25/75, 10/90, etc. as long as all possibilities add to 100%.
In this case, it's weighted towards the box with two gold balls because it has twice as many gold balls. So it's 2/3 that you drew the ball from the box with two gold balls versus 1/3.
Yes, you made a fair random choice between two boxes. And if all we did was eliminate one box somehow and choose between two boxes, it would be 50/50. But we have more information than that, we also have the gold ball.